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Author: Lemon Nan Original address: https://mp.weixin.qq.com/s/SUUHF9R_FKg-3vq7Q3cwBQ The original text and address shall be indicated introduce Clickhouse itself is an analytical database, which provides many synchronization schemes with other components. This paper will take Kafka as the data source to introduce how to synchronize Kaf ...

1, Data type There are only three basic types: value, string and time. There is no Boolean type, but you can use integer 0 or 1 instead. ClickHouse's data types are compared with those of other common storage systems: Official website: https://clickhouse.tech/docs/zh/sql-reference/data-types/   1.1 value type Numerical types are divided ...

" Elasticsearch is a real-time distributed search and analysis engine. Its bottom layer is built on Lucene. In short, Lucene has distributed functions by expanding its search capabilities. ES usually provides end-to-end log / search analysis together with the other two open source components Logstash (log collection) and Kibana (dashboard ...

MergeTree¶ Family (LSM tree data structure) Replicated + MergeTree = replicated MergeTree MergeTree : Replaceingmergetree: de duplication of data with the same sort key during background data consolidation. SummingMergeTree: when merging data, records with the same primary key will be merged into one record. According to the aggregation fi ...